Home / 28,212.52-38,930.66-15,636.20

Finding the Fourth Proportional to 28,212.52, 38,930.66 and 15,636.20

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Solution

The fourth proportional to 28,212.52, 38,930.66 and 15,636.20 is: 21,576.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.52 : 38,930.66 = 15,636.20 : x
  2. Step 2: Convert to fraction form
    28,212.52/38,930.66 = 15,636.20/x
  3. Step 3: Cross multiply
    28,212.52x = 38,930.66 × 15,636.20
  4. Step 4: Simplify right side
    28,212.52x = 608,727,585.89
  5. Step 5: Solve for x
    x = 608,727,585.89/28,212.52
  6. Step 6: Final answer
    x = 21,576.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.